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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Am+J+Clin+Nutr
2014 ; 100
(6
): 1479-88
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Alcohol, one-carbon nutrient intake, and risk of colorectal cancer according to
tumor methylation level of IGF2 differentially methylated region
#MMPMID25411283
Nishihara R
; Wang M
; Qian ZR
; Baba Y
; Yamauchi M
; Mima K
; Sukawa Y
; Kim SA
; Inamura K
; Zhang X
; Wu K
; Giovannucci EL
; Chan AT
; Fuchs CS
; Ogino S
; Schernhammer ES
Am J Clin Nutr
2014[Dec]; 100
(6
): 1479-88
PMID25411283
show ga
BACKGROUND: Although a higher consumption of alcohol, which is a methyl-group
antagonist, was previously associated with colorectal cancer risk, mechanisms
remain poorly understood. OBJECTIVE: We hypothesized that excess alcohol
consumption might increase risk of colorectal carcinoma with hypomethylation of
insulin-like growth factor 2 (IGF2) differentially methylated region-0 (DMR0),
which was previously associated with a worse prognosis. DESIGN: With the use of a
molecular pathologic epidemiology database in 2 prospective cohort studies, the
Nurses' Health Study and Health Professionals Follow-up Study, we examined the
association between alcohol intake and incident colorectal cancer according to
the tumor methylation level of IGF2 DMR0. Duplication-method Cox proportional
cause-specific hazards regression for competing risk data were used to compute
HRs and 95% CIs. In addition, we investigated intakes of vitamin B-6, vitamin
B-12, methionine, and folate as exposures. RESULTS: During 3,206,985 person-years
of follow-up, we identified 993 rectal and colon cancer cases with an available
tumor DNA methylation status. Compared with no alcohol consumption, the
consumption of ?15 g alcohol/d was associated with elevated risk of colorectal
cancer with lower levels of IGF2 DMR0 methylation [within the first and second
quartiles: HRs of 1.55 (95% CI: 1.08, 2.24) and 2.11 (95% CI: 1.44, 3.07),
respectively]. By contrast, alcohol consumption was not associated with cancer
with higher levels of IGF2 DMR0 methylation. The association between alcohol and
cancer risk differed significantly by IGF2 DMR0 methylation level
(P-heterogeneity = 0.006). The association of vitamin B-6, vitamin B-12, and
folate intakes with cancer risk did not significantly differ according to IGF2
DMR0 methylation level (P-heterogeneity > 0.2). CONCLUSIONS: Higher alcohol
consumption was associated with risk of colorectal cancer with IGF2 DMR0
hypomethylation but not risk of cancer with high-level IGF2 DMR0 methylation. The
association between alcohol intake and colorectal cancer risk may differ by tumor
epigenetic features.